Java ElasticSearch无法找到字符串字段中存在的精确值_Java_<img Src="//i.stack.imgur.com/RUiNP.png" Height="16" Width="18" Alt="" Class="sponsor Tag Img">elasticsearch_Lucene

Java ElasticSearch无法找到字符串字段中存在的精确值

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Java ElasticSearch无法找到字符串字段中存在的精确值,java,elasticsearch,lucene,Java,elasticsearch,Lucene,当我做一个空查询来列出一些结果时，我看到值就在那里。例： { "took": 6, "timed_out": false, "_shards": { "total": 5, "successful": 5, "failed": 0 }, "hits": { "total": 3024, "max_score": 1.0, "hits": [{

当我做一个空查询来列出一些结果时，我看到值就在那里。例：

{
    "took": 6,
    "timed_out": false,
    "_shards": {
        "total": 5,
        "successful": 5,
        "failed": 0
    },
    "hits": {
        "total": 3024,
        "max_score": 1.0,
        "hits": [{
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5-j6uVuoyTMhX204",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail1029.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5-mTuVuoyTMhX205",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail1321.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5-xkuVuoyTMhX209",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail2567.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5zr8uVuoyTMhX20F",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail2122.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5z23uVuoyTMhX20L",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail1823.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5-53uVuoyTMhX21A",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail1616.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5_AXuVuoyTMhX21C",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail3002.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5_j3uVuoyTMhX21U",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail3039.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5_yQuVuoyTMhX21d",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail1136.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5zbquVuoyTMhX20C",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail166.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5zfsuVuoyTMhX20E",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail2767.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt59jQuVuoyTMhX20p",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail2852.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5_PpuVuoyTMhX21J",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail1392.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt58YguVuoyTMhX20N",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail603.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5_38uVuoyTMhX21h",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail416.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt5-JFuVuoyTMhX20y",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail896.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt6B1NuVuoyTMhX22i",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail846.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt6B3vuVuoyTMhX22k",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail1214.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt6B90uVuoyTMhX22o",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail1536.png"
            }
        }, {
            "_index": "geotiff_test",
            "_type": "geometa",
            "_id": "AVtt6COkuVuoyTMhX22y",
            "_score": 1.0,
            "_source": {
                "thumbnail": "thumbnail246.png"
            }
        }]
    }
}

但是，当我运行这样的查询时，它不会返回任何结果：

curl -X POST http://localhost:9200/geotiff_test/geometa/_search -d '{
    "query": {
        "term": {
            "thumbnail": "thumbnail1536.png"
        }
    }
}'

结果是：

{
    "took": 1,
    "timed_out": false,
    "_shards": {
        "total": 5,
        "successful": 5,
        "failed": 0
    },
    "hits": {
        "total": 0,
        "max_score": null,
        "hits": []
    }
}

如果这是Solr，我只想运行这个简单的查询：

thumbnail1536.png“

有人能告诉我这里出了什么问题吗？

这取决于字段的映射/键入方式。请参考弹性搜索网站上的内容

请注意，您可以更改映射以更好地满足您的需要。

这取决于字段的映射/键入方式。请参考弹性搜索网站上的内容

请注意，您可以更改映射以更好地满足您的需要。

精确术语不匹配，因为您的文档字段

缩略图

已使用

标准

分析器进行分析，并将其存储为

缩略图1536

和

png

在Elasticsearch中，对

文本

（全文）和

关键字

（确切术语）有不同的查询。你写的那个属于后一类

如果运行以下

全文查询，您将获得所需的结果：
curl -X POST http://localhost:9200/geotiff_test/geometa/_search -d '{
    "query": {
        "match": {
            "thumbnail": "thumbnail1536.png"
        }
    }
}'

但是，当您尝试使用术语搜索确切术语时，首选查询
curl -X POST http://localhost:9200/geotiff_test/geometa/_search -d '{
    "query": {
        "term": {
            "thumbnail.keyword": "thumbnail1536.png"
        }
    }
}'

注意：这里的.keyword
是缩略图
字段的关键字
版本
虽然两个查询都产生相同的结果，但上面的查询比前一个查询效率更高
 精确术语不匹配，因为您的文档字段缩略图
已使用标准
分析器进行分析，并将其存储为thumbnail1536
和png

在Elasticsearch中，对文本
（全文）和关键字
（确切术语）有不同的查询。你写的那个属于后一类
如果运行以下全文查询，您将获得所需的结果：
curl -X POST http://localhost:9200/geotiff_test/geometa/_search -d '{
    "query": {
        "match": {
            "thumbnail": "thumbnail1536.png"
        }
    }
}'

但是，当您尝试使用术语搜索确切术语时，首选查询
curl -X POST http://localhost:9200/geotiff_test/geometa/_search -d '{
    "query": {
        "term": {
            "thumbnail.keyword": "thumbnail1536.png"
        }
    }
}'

注意：这里的.keyword
是缩略图
字段的关键字
版本
虽然两个查询都产生相同的结果，但上面的查询比前一个查询效率更高
 我真的是个新手。所以我不知道为什么这很重要，因为在Solr中，该查询将对字符串或文本字段起作用。所以我不知道为什么这很重要，因为在Solr中，该查询将针对字符串或文本字段。